The 72X6-01108 is a high performance, costeffective SFP transceiver. It provides up to 1.25 Gbps bi-directional data transfer rate at distances up to 40km on a single fiber core. These bi-directional SFP Transceivers allow data transfer in either direction through a single optical fiber by employing separate wavelengths travelling in either direction. The 72X6-01108 transmits using a wavelength of 1310nm and receives using a wavelength of 1550nm. When coupled with the Cablewholesale 72X6-01109 transceiver which transmits at and receives at the opposite rates (1310nm TX and 1550nm RX) you get bi-direction data communication on a single fiber core.